diff --git a/experiments/heroku/README.md b/experiments/heroku/README.md
index 7f98a7ea..24668a35 100644
--- a/experiments/heroku/README.md
+++ b/experiments/heroku/README.md
@@ -4,7 +4,7 @@
 
 Clicking on the following button will forward you to Heroku to begin the deployment process:
 
-<a href="https://heroku.com/deploy?template=https://github.com/chanzuckerberg/cellxgene">
+<a href="https://heroku.com/deploy?template=https://github.com/chanzuckerberg/cellxgene/tree/main">
  <img src="https://www.herokucdn.com/deploy/button.svg" alt="Deploy">
 </a>